There is a standard 3.5mm interface for audio output (speaker). You can add any supported USB microphone, or you can use the I2S interface to add a codec for additional audio I/O.

No, we don't recommend you to do this, it may damage your SD card. We recommend using the sudo poweroff or sudo shutdown command before disconnecting the power. This ensures that any unfinished file transactions are written to the SD card and the SD card is in inactive status. Unplugging the power supply while the SD card is working can sometimes cause damage.

Power failure can cause problems to various electronic devices, and DEBIX is no exception. If the power is turned off without a normal shutdown, the SD card may be damaged. This is because the system may write into the SD card when the power is off, leaving the SD card file system in an invalid state. Therefore, if you cannot prevent power interruptions, one way to make the system safer is to limit writing to the SD card, or even stop it completely. You can disable swap, enable logging to RAM, and disable systemd-timesyncd, all of which greatly reduce accesses to the SD card.

It depends on the USB hub. Some hubs comply with the USB 2.0 standard and only provide 500mA per port, which is not enough to power your DEBIX.

Running DEBIX directly on the battery requires more attention, and it may damage your DEBIX. However, if you are a practised user, you can give it a try. For example, the four most common AA rechargeable batteries can provide 4.8V when fully charged. Technically 4.8V is just within the tolerance of DEBIX, but as the battery runs out, the system quickly becomes unstable. While four AA alkaline (non-rechargeable) batteries can provide 6V voltage, which exceeds the acceptable tolerance range and may damage your DEBIX. By using a buck and/or boost circuit, you can ensure stable 5V voltage (or using a charger set specifically designed to output a stable 5V from several batteries). These devices are usually sold as emergency battery chargers for mobile phones.

DC 5V/3A input with Type-C interface.

Yes, but it need to be equipped with a POE power supply module.

Yes, please refer to the DEBIX User Manual.

Micro SD card.

Although the minimum capacity of 8GB should be enough for most people, we have tried SD cards up to 128GB and they all work well. You can also connect a USB flash disk or mobile hard disk to provide additional storage capacity.